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Response of muscle‐based biochemical condition indices to short‐term variations in food availability in post‐flexion reared sea bass Dicentrarchus labrax (L.) larvae
Author(s) -
Catalán I. A.,
Berdalet E.,
Olivar M. P.,
Roldán C.
Publication year - 2007
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.2007.01307.x
Subject(s) - dicentrarchus , biology , sea bass , citrate synthase , lactate dehydrogenase , larva , zoology , fishery , anatomy , biochemistry , enzyme , fish <actinopterygii> , ecology
Six condition indices based on RNA, total soluble protein and two metabolic enzymes [lactate dehydrogenase (LDH) and citrate synthase (CS)] were analysed in muscle tissue of individual larvae, post‐flexion reared sea bass Dicentrarchus labrax using DNA and total soluble protein as standards for size. In addition, the effect of 2 days of food deprivation on the cell proliferation rates was assessed. The RNA:DNA best reflected short‐term changes in feeding conditions. If standardized by DNA content, LDH activity was a better indicator of condition than any other index but RNA:DNA. Further, the analysis of cell proliferation rates in muscle from 26 day‐old larvae proved useful in distinguishing continuously fed larvae from individuals subjected to 2 days of fast.